The model/actress spoke out on Twitter Wednesday, days after Imperial Publishing announced the December release of a book of four-year-old, unpublished pictures by photographer Jonathan Leder. Ratajkowski said she initially resisted reacting to news of the book, because she wanted to avoid giving Leder publicity.

I've been resisting speaking publicly on the recently released photos by Jonathan Leder to avoid giving him publicity. But I've had enough

On Thursday, Ratajkowski followed up with more tweets, explaining that she was not paid and didn't sign a release for the photos. "That said, the legal side of this is private and I would appreciate it if people waited to base their opinions on facts rather than speculation or assumptions," she wrote.

Ratajkowski, 25, appears in suggestive poses, partially clothed and completely nude in the $80 collectors edition of the photo book. She tweets that publishing the book "is an example of exactly the opposite of what I stand for: women choosing when and how they want to share their sexuality and bodies."

An online description of the book says that the photos were taken when "photographer Jonathan Leder found himself alone in a house with a Polaroid camera and Emily Ratajkowski. This was before the black-haired, red-lipped stunner had shot to fame with her undeniably sexy performance in Robin Thicke’s arguably sexist Blurred Lines video. Leder wasn’t shooting her because she was a celebrity. He’d simply seen something in her previous work that made him think this L.A. model wasn’t like all the others."

The photos are also being exhibited at Chelsea's Castor Gallery in February, which Ratajkowski presumably is also unhappy about. Castor Gallery and Imperial Publishing did not immediately respond to USA TODAY's request for comment.